From patchwork Wed May 6 13:39:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kara X-Patchwork-Id: 11531219 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 16B5D913 for ; Wed, 6 May 2020 13:39:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 08145206D5 for ; Wed, 6 May 2020 13:39:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728528AbgEFNjk (ORCPT ); Wed, 6 May 2020 09:39:40 -0400 Received: from mx2.suse.de ([195.135.220.15]:52164 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728081AbgEFNjk (ORCPT ); Wed, 6 May 2020 09:39:40 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id D803CAE8C; Wed, 6 May 2020 13:39:41 +0000 (UTC) Received: by quack2.suse.cz (Postfix, from userid 1000) id A7BC81E12FB; Wed, 6 May 2020 15:39:38 +0200 (CEST) From: Jan Kara To: Jens Axboe Cc: linux-block@vger.kernel.org, Jan Kara Subject: [PATCH 0/3] Fix blkparse and iowatcher for kernels >= 4.14 Date: Wed, 6 May 2020 15:39:30 +0200 Message-Id: <20200506133933.4773-1-jack@suse.cz> X-Mailer: git-send-email 2.16.4 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org I was investigating a performance issue with BFQ IO scheduler and I was pondering why I'm not seeing informational messages from BFQ. After quite some debugging I have found out that commit 35fe6d763229 "block: use standard blktrace API to output cgroup info for debug notes" broke standard blktrace API - namely the informational messages logged by bfq_log_bfqq() are no longer displayed by blkparse(8) tool. This is because these messages have now __BLK_TA_CGROUP bit set and that breaks flags checking in blkparse(1) and iowatcher(1). This series fixes both tools to be able to cope with events with __BLK_TA_CGROUP flag set. Honza